Cutter-head



G. A. ANDERSON.

CUTTER HEAD.

- APPLICATION FILED AUG.13, l9l8.

1,327,007, I Patented Jan. 6,1920.-

2 SHEETS-SHEET I.

GustafAAnderson a2, WMW

G. A. ANDERSON.

CUTTER HEAD.

APPLICATION FILED AUG.I3. 191s.

1,327,007. Patented Jan. 6,1920.

2 SHEETSSHEET 2- gvwemto z Gustaf Anderson :1 ICE.

GUSTAJF AR'VID ANDEREQON, DF'VIAYNESJBORO, PENNSYLVANIA, ASSIGNUE T LANDIS srtvamn.

CUTTER-HEAD.

Specification of Letters Patent.

Patented Jan. d, 192..

Application filed August 13, 191$. Serial No. 249,709.

To all-whom it may concern."

Be it known that T, GUsTAr A. AND RSON, acitizen of the United States, residing at Waynesboro, Franklin county, and State of Pennsylvania, have invented and discovered certain new and useful Improvements in Cutter-Heads, of which the following is a specification.

The object of my said invention is to provide a cutterhead for cutting threads on pipes bolts, tc, which will be comparatively inexpensive in construction but yet complete and efiicient in its operation, all as will be hereinafter more fully described and claimed.

Referring to the accompanying drawings, which are made a part hereof and on which similar reference characters indicate similar parts,

Figure 1 is a face view, or front elevation, of a cutter-head of my improved construction,

Fig. 2, a detail view on the dotted line 22 in Fig. 1,

Fig. 3, an edge elevation,

V Fig. 4, a detail section on the dotted line H in Fi i,

ldig. 5, a detail side elevation of one of the cutters or chasers,

Fig. 6, a detail section on the dotted line 66 in Fig. 1,

Fig. 7, is a fragmentary side elevation of a positioning pin and a sectional view of its engaging block.

Tn said drawings the portions marked A represent the stand or frame on which the cutterhead is mounted, B one of the hinged sections of the body of the head, C the other hinged section, D the cutter holders, and E th cutters, or chasers.

The stand A is secured to the carriage of the thread-cutting machine by means of flanges or feet 10 which fit upon said can riage and belts or screws which extend through perforations 11 therein into said carriage. Said machine may incorporate a cutting off and reaming attachment which, howvever need not be described herein.

The parts B and Q of the head body are t pivoted together on a pin 12 mounted in the upper part of stand A forming a hinge-like said two parts. The central portion the hinge extends from part ivhilc side portions 71 extend from part C. The -.'er portions of said parts of the head body, depending from said hinge, together form substantially a full ring, the center .line of which, at point 13, is the axis of the stock to be threaded. Each of the body port1ons B and C is formed with two ways in which cutter-holders D are mounted. The body part B has a way near its upper end 14 in which is mounted one of the cutter-holders D and a way 15 near its lower side in which is mounted another of said outter-holders, the two ways extending at right angles to each other. Part C is provided with ways 16 and 17 of like arrangement. Adjacent ways are at right angles to each other and alternate ways parallel with each otheraround the die. Each cutter-holder is formed with a tongue 72 on its face adapt ed to be mounted and to slide in its appropriate way. The chasers or cutters E are adjustably mounted in a position tangential to the worlr on each of said cutter-holders after the manner common in the Landis type of cutter-head. The cutter-holders D are secured to the body parts by bolts 18, which pass through apertures 20 in said body parts, the inner ends of which are screw-threaded and engaged with screw-threaded perforations in said holders and the outer ends of which are provided with heads which bear upon washers 19, which rest against the faces of said body portions under said heads. The inner ends of said holders and chasers are adjusted to secure the size of die required and supported in adjusted position by means of bolts 21, which are anchored to pins 22 which extend through apertures in the body portion alongside the way in which the holder is mounted. Each of said pins projects on each side of the body and each end is formed with an open ended slot and with flat faces with which a nut 23 on one side of the pin and a nut 24,- on the other side of the pin engage, by which means the parts are adjusted and supported in proper relative positions, said nuts being adapted to clamp each pin on its said flat faces and rigidly support pin 21, and the holder D to which its inner end is secured. Elaid pins 22 extend entirely through the body and project equal distances beyond the oppo- 1 site faces thereof and both ends are slotted uniformly as shown.

Head body part B is slotted or formed with a channel in its inner edge, at 25,

and head body part C is formed with a spur t or tongue 26 adapted to project into slot or channel and thus maintain, in cooperation with the hinge parts and 71, unchanging planar relationship between the two body parts B and C. A rod 27 1s connected by a pintle 28 to body part B, sa d pintle is mounted in the walls of the slot 25. Said rod 27 extends through an aperture in the body part C through a block 29 and a Washer 30 and is screw-threaded at its outer end and has a nut 31 thereon. Said nut 31 is split on one side and adapted to be clamped on the end of said rod by a clamping bolt 32. Block 29 is formed wlth trunnions 33 which engage the walls of the slot of a bifurcated lever 34 pivoted to the body part C on pivots 35. Said lever is shown as formed of the two parts 34 secured at their upper ends to a handle 80 by screws 81, but any appropriate form mayof course be employed. Extensions 36 on the lower end of said lever are adapted to contact with faces 37 on the side of the body part C and limit the movement of said lever when the pivots 28, 35 and 33 are in alinement. Reach bars 38 are pivoted to the lever 34 by pivots 39 at one end and to a lever 40 by a pivot 41 at their other end. Said lever 40 is mounted on a pivot 43 between the wings of a bifurcated bracket 42 secured on the side of the head or on body part B opposite the lever 34.

The adjacent faces of the body parts B and C just under the hinge 12 are formed with appropriate seats and stiff helical springs 44 and 45 mounted on oppositely projecting lugs on a block 46 are interposed between said members. Spring 45 is seated at one end in the seat in .part C and at its other end against adjacent face of block 46. The seat in body part B continues through said body part in the form of aperforation which is partly filled by a screw-threaded plug 47. An aperture through the lower end of lever 41 provides access to said plug for its adjustment by means of a screwdriver by which the tension of said springs 44 and 45' may be regulated as desired.

Block 46 is held in position by a pin 76 I which extends through the base A and has a reduced inner end 77 which projects through a perforation in said block. Said pin has a knob 78 on its outer end for convenience in handling.

The lower end of body part C is formed with a neck portion 48, and wings 49 extend each way from said neck portion and are formed with recessed abutment faces 50 and tooth-like projections 51 for engagement with recesses 52 formed in the sides of an extension 53 on the stand or frame A. This stand or frame being secured to the carriage of the thread-cutting machine thus carries and holds the cutter-head by the pivot 12 at its upper end and these extensions engaging mounted being slightly opened by a radial slot as shown. 55 are abutment faces on the side of stand A, just below the line of the pivot 12, with which the end of a pm 56, projecting through a transverse perforation and extending for a distance beyond each side of the body part C, is adapted to engage when the die head is swung sufficiently around pin 12 to make such engagement possible.

In adjusting the parts, the cutter-holders are first adjusted in the ways 14, 15, 16 and 17, being clamped in the position desired by means of the clamping bolts 18 and the adjustment of nuts 23 and 24 on bolts 21.

Each cutter-holder is capable .of an adjust ment limited by the width of the slot 20 in which the bolt 18 is mounted. The cutter-holders and chas'ers being fixed in the position desired for the size of die required by the work, the die is closed by bringing the parts to the position shown in Fig. 1 with the lever 34 in position'so that its points 36 bear upon the faces 37 of the part C.- The parts are tightened in closed position by adjusting the nut 31 on the end of rod 27, which is done by loosening bolt 32 sufficiently to permit said nut 31 to be turned and then turning said nut until the faces of the parts B and C of the body bear tightly against each other at the point 85. Any loosening of the parts as the result of wear or strain can be taken up in the same manner. After all slack is taken up the nut 31 is clamped by the bolt 32 against any possi ble movement.

In 0 ening the die the lever 34 is thrown upwar and forward until its edges strike the stop pads 86 positioned on the edge of part C to receive the contact with edges of the two parts of said lever when it is thrown forward.

Whenever a change is desired in the size body indicating the size of the work which is to be threaded.

1n the drawings the head illustrated is arranged for cutting right-hand threads. To adapt the head for cutting left-hand threads the cutter-holders are removed, bolt 54 is slightly loosened when the pin 12 with the 'dicator mark coincides with the line on the members hinged nuance? die head thereon may he slid out of its hearing in the stand A, the pin 12 slid through the bearing in the body parts B and C until its end is flush with the opposite face of said body part, or the lace previously abutting the stand, the whole die head is turned around and the pin 12 again inserted in its bearing in the stand A. The bolt 54. is again turned to clamp said pin tightly in the perforation in said stand. A set of grooves or ways are provided on the faces of the body parts B and C opposite to the face before exposed which correspond to the ways 14, 15, 16 and 17 before described. Another set of cutter-holders, adapted for leithand work, are then mounted on this side of the die body in identically the same manner and with the same means as before described, using the opposite ends of the pins 22 as the supports,

for the inner ends oi said cutter-holders. When the die-head is thus turned lever 30 assumes the position opposite the operator in respect to the stock while lever 40 takes its place and enables the operator to control the die and the work from the same position'he occupied while doing right-hand work.

When short work is to be cut oil, such as short screw-threaded nipples, the whole diehead must be out of the way and the stock holding chuck brought as close as possible to the stand A. To provide for this the whole die-head is swung, while closed, around the pin 12 as the center until the pin 56 in the body part C contacts with the face on the stand A which stops and supports the die-head in an out oi the way position, and beyond the center or" gravity so as to insure that the same will not start on a return swing accidentally.

This die-head is not intended as a substitute for standard die-heads, such as the Landis type, in all classes of work but is intended to form part of the equipment of a complete pipe threading machine, designed on lines to admit of a lower selling price than such standard machines, and being adapted for such purposes as may be required in the business or the average plumber or other person in whose business pipe threading comprises a considerable item but not the complete business.

Having thus fully described my said invention, what I claim as new and desire to secure by Letters lu:

l. A cutter-head comprising pivoted body members having cutter supports on both races thereof, means for supporting said body members either face out, means for mounting cutter-holders on both laces or" said body members, and means tor opening and closing the die from either side thereof, substantially as set forth.

2. A cutter-head com body with cutter supports on both faces, means for mounting and supporting cutter supports in in either of said faces, means for supporting said members either face out, and connected leversv on opposite sides of said head. for opening and closing, said die whereby said head may be reversed and used for righthand or left-hand cutting and operated from the same side, substantially as set forth.

3. A cutter-head comprising two members hinged together and having interengaging channels and projections, means for normally opening said members to release the work, means for holding said cutters closed, cutter-holders mounted on said members, and means for adjusting said cutter-holders on said members to increase or decrease the size of the die, substantially as set forth.

4. A cutter head comprising pivoted jaws supported upon their pivot, cutters carried by the pivoted jaws, means to open and close the jaws, and removable means centering the cutters. v

5. in a cutter head pivoted jaws supported upon their pivot, cutters carried by the jaws, means to open and close the jaws, a removable means adapted to center the cutters when in engagement and when out of engagement to permit the jaws to swing about their pivot.

6. A cutter head comprising pivoted jaws supported upon their pivot, and complementary inter-engaging depressions and entensions carried by the jaws spaced from the pivot adapted to hold the jaws in alinement. I

7. A cutter head comprising pivoted jaws supported upontheir pivot, cutters carried by the jaws, means to open and close the jaws, means-auxiliary to the pivot for holding the jaws in operative alinement, and removable means engaging the jaws tohold the cutters properly centered and to permit the aws as an organized structure to swing about their pivot.

8. A cutter head comprising pivoted jaws, cutters carried by the jaws, a lever pivoted upon one or the jaws, means connecting the pivot and the other jaws whereby the jaws are closed by manipulation of the lever, a second lever pivoted upon the opposite side or the combined structure, and means connecting such levers whereby such levers operate in synchronism.

19. A cutter head comprising pivoted jaws having cutter positioning ways formed in their faces, a lever pivoted upon one of the jaws upon the side normally next to the operator and adapted when manipulated to open and close the jaws, means to reverse the jaws as an organized structure, and a second lever pivoted upon the jaws opposite the first menonedlever and operatively connected comp-rising pivoted jaws Mid Zlllh llltl operator, means to with cutter positioning ways formed in their opposite faces, a lever pivoted to the jaws upon the side normally adjacent the reverse the jaws as an organized structure, a second lever pivoted upon the jaws opposite the first mentioned lever and brought intooperative position by the reversal of the jaws, and links connecting the jaws and extending across a part of the jaw structure.

11. A cutter head comprising pivoted j aws having cutter retaining means formedupon their opposite faces, means to support the jaws upon their pivot, means to reverse the aws as an organized structure upon their pivot, and manual means formed upon opposite sides of the jaw structure adapted to open and close the jaws in either position.

12. A cutter head comprising jaws pivoted upon a stationary pintle, cutters carried by the jaws and movable tangentially to a circle whose center is spaced from the center of pivoting the jaws, means to open and close the jaws, and removable means for maintaining the jaw structure rigidly upon its pivot with the cutters centered relative to the required working tangent:

13. A cutter head comprising jaws pivoted upon a stationary intle, means manually operated for securlng the jaws rigidly properly centered and tongue and groove portions provided upon the jaws adapted to inter-engage and maintain the jaws in operative alinement.

In witness whereof, I have hereunto set my hand and seal at Waynesboro, Pennsylvania this 8th day of August, A. D. nine teen hundred and eighteen.

GUSTAF ARVID ANDERSON. [L. 5.]

Witnesses:

J. G. BENEDICT, ALF. N. RUSSELL. 

